keyboard.lst

５１实例大全

C51 COMPILER V7.06   KEYBOARD                                                              06/09/2010 11:57:30 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE KEYBOARD
OBJECT MODULE PLACED IN .\obj\keyboard.obj
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE keyboard.c BROWSE DEBUG OBJECTEXTEND PRINT(.\obj\keyboard.lst) OBJECT(.\obj
                    -\keyboard.obj)

stmt level    source

   1          /*-----------------------------------------------
   2            名称：矩阵键盘
   3            论坛：www.doflye.net
   4            编写：shifang
   5            日期：2009.5
   6            修改：无
   7            内容：
   8          ------------------------------------------------*/
   9          #include<reg52.h> //包含头文件，一般情况不需要改动，头文件包含特殊功能寄存器的定义
  10          #include"keyboard.h"
  11          #include"delay.h"
  12          
  13          #define KeyPort P3
  14          
  15          /*------------------------------------------------
  16          按键扫描函数，返回扫描键值
  17          ------------------------------------------------*/
  18          unsigned char KeyScan(void)  //键盘扫描函数，使用行列反转扫描法
  19          {
  20   1       unsigned char cord_h,cord_l;//行列值中间变量
  21   1       KeyPort=0x0f;            //行线输出全为0
  22   1       cord_h=KeyPort&0x0f;     //读入列线值
  23   1       if(cord_h!=0x0f)    //先检测有无按键按下
  24   1       {
  25   2        DelayMs(10);        //去抖
  26   2        if((KeyPort&0x0f)!=0x0f)
  27   2        {
  28   3          cord_h=KeyPort&0x0f;  //读入列线值
  29   3          KeyPort=cord_h|0xf0;  //输出当前列线值
  30   3          cord_l=KeyPort&0xf0;  //读入行线值
  31   3      
  32   3          while((KeyPort&0xf0)!=0xf0);//等待松开并输出
  33   3      
  34   3          return(cord_h+cord_l);//键盘最后组合码值
  35   3         }
  36   2        }return(0xff);     //返回该值
  37   1      }
  38          /*------------------------------------------------
  39          按键值处理函数，返回扫键值
  40          ------------------------------------------------*/
  41          unsigned char KeyPro(void)
  42          {
  43   1       switch(KeyScan())
  44   1       {
  45   2        case 0x7e:return 0;break;//0 按下相应的键显示相对应的码值
  46   2        case 0x7d:return 1;break;//1
  47   2        case 0x7b:return 2;break;//2
  48   2        case 0x77:return 3;break;//3
  49   2        case 0xbe:return 4;break;//4
  50   2        case 0xbd:return 5;break;//5
  51   2        case 0xbb:return 6;break;//6
  52   2        case 0xb7:return 7;break;//7
  53   2        case 0xde:return 8;break;//8
  54   2        case 0xdd:return 9;break;//9
C51 COMPILER V7.06   KEYBOARD                                                              06/09/2010 11:57:30 PAGE 2   

  55   2        case 0xdb:return 10;break;//a
  56   2        case 0xd7:return 11;break;//b
  57   2        case 0xee:return 12;break;//c
  58   2        case 0xed:return 13;break;//d
  59   2        case 0xeb:return 14;break;//e
  60   2        case 0xe7:return 15;break;//f
  61   2        default:return 0xff;break;
  62   2       }
  63   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    167    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)